b8de35658f
* Put something on screen * Use the 32bit watch_date_time repr to pass from JS * Implement periodic callbacks * Clear display on enabling * Hook up watch_set_led_color() to SVG (green-only) * Make debug output full-width * Remove default Emscripten canvas * Implement sleep and button clicks * Fix time zone conversion bug in beats-time app * Clean up warnings * Fix pin levels * Set time zone to browser value (if available) * Add basic backup data saving * Silence format specifier warnings in both targets * Remove unnecessary, copied files * Use RTC pointer to clear callbacks (if available) * Use preprocessor define to avoid hardcoding MOVEMENT_NUM_FACES * Change each face to const preprocessor definition * Remove Intl.DateTimeFormat usage * Update shell.html title, header * Add touch start/end event handlers on SVG buttons * Update shell.html * Update folder structure (shared, simulator, hardware under watch-library) * Tease out shared components from watch_slcd * Clean up simulator watch_slcd.c inline JS calls * Fix missing newlines at end of file * Add simulator warnings (except format, unused-paremter) * Implement remaining watch_rtc functions * Fix button bug on mouse down then drag out * Implement remaining watch_slcd functions * Link keyboard events to buttons (for keys A, L, M) * Rewrite event handling (mouse, touch, keyboard) in C * Set explicit text UTF-8 charset in shell.html * Address PR comments * Remove unused directories from include paths
52 lines
1.1 KiB
ReStructuredText
Executable File
52 lines
1.1 KiB
ReStructuredText
Executable File
The SPI Master Synchronous Driver
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=================================
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The serial peripheral interface (SPI) is a synchronous serial communication
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interface.
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SPI devices communicate in full duplex mode using a master-slave
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architecture with a single master. The master device originates the frame for
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reading and writing. Multiple slave devices are supported through selection
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with individual slave select (SS) lines.
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Features
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--------
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* Initialization/de-initialization
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* Enabling/disabling
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* Control of the following settings:
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* Baudrate
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* SPI mode
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* Character size
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* Data order
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* Data transfer: transmission, reception and full-duplex
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Applications
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------------
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Send/receive/exchange data with a SPI slave device. E.g., serial flash, SD card,
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LCD controller, etc.
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Dependencies
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------------
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SPI master capable hardware
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Concurrency
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-----------
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N/A
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Limitations
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-----------
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The slave select (SS) is not automatically inserted during read/write/transfer,
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user must use I/O to control the devices' SS.
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Known issues and workarounds
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----------------------------
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N/A
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